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IIIT STATEg TENT IQ.

GEORGE E. LINDBERG, OF DULUTH, MINNESOTA, ASSIGNOR TO DIAMOND CALK HORSESHOE 00., 0F DULUTH, MINNESOTA, A CORPORATION OF MINNESOTA.

. HORSESHOE.

Specification of Letters Patent.

Patented Nov. 4, 1919.

Application filed February 19, 1915. Serial No. 9,272.

To all whom it may concern:

Be it known that I, GEORGE E. LINDBERG, a citizen of the United States,residing at Duluth, in the county of St. Louis and State of Minnesota,have invented certain new and useful Improvements in Horseshoes; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

It is desirable in fitting shoes to horses that the calks of the shoe beset at different angles or different positions for different horses.This'is for the reason that with some horses the toe and heel calks, tobest adapt the shoe to the horse, should be set at right angles to thebody of the shoe, while with others, where the horse has a tendency tothrow its feet outwardly, or interfere, i. a, strike the hoof of onefoot against the opposite foot, it is desirable that the heel calks beset obliquely. Oftentimes these different tendencies of a'horse are notknown at the time of fitting and nailing the shoe to its foot, and inother cases, the shoe may be adapted to a horse at the time it is fittedand nailed but the horse later acquires the habit of interfering orthrowing its feet outwardly, which makes it necessary to refit the shoeor calks thereof. With the shoes now in use, it would be necessary toeither remove the shoe and replace it with an entirely new one, or toremodel or recast the 01d shoe or calks thereof.

It is the object of my invention to provide a horseshoe and calkstherefor so designed that the calks may be readily removed and set to orat different angles to fit a shoe of the proper size to differenthorses, or rather to adapt a shoe of the desired size to differenthorses.

The above and other features of novelty, advantages and capabilitieswill become apparent from a detailed description of the accompanyingdrawings in which I have illustrated two practical embodiments of theinvention, but the constructions shown therein are to be considered asillustrative only and not as defining the limits of the invention.

Figure l is a bottom view of a horseshoe embodying one form of myinvention showing the heel calks removed;

Figs. 2 and 3 are detailed views of the calks gland opening in the shoeshown in Fig. 1; an

'Figs. 4 and 5 are modifications of the same.

In the drawings, the shoe 10 illustrated is shown with the toe calks 11in place while the heel calks are removed.

The shoe is provided with an opening for each calk, which openings areadapted to receive the shank 12 of the calk. In the form shown in Figs.1, 2, and 3, the openings in the shoe are provided with an integralspline 13 adapted to fit into any one of the plurality of grooves 14formed in the periphery of the shank of the calk. By providing theopening with a spline and the shank of the calks with a plurality ofgrooves as shown, the calks may be adjusted to different positions toproperly lit and adapt: a shoe of the proper size to different horses.

In the modification shown in Figs. 4 and 5, this same result isaccomplished by providing the opening in the shoe with a plurality ofgrooves 15 and the shank of the calk with a spline 16, which spline isadapted to fit into any one of said grooves when the calk is inserted inits position.

My invention is capable of other modifications than the two formsillustrated in the drawings and hereinbefore specially described, but Ido not wish to be understood as limiting myself to the specific formsshown, except in those claims where these features are specified.

Having thus described my invention, what I claim is:

1. A horseshoe having an opening therein for receiving the shank of acalk, a spline formed in said opening, a calk provided with a shankadapted to fit into said opening and be removable therefrom, said shankhaving formed around its circumference a plurality of longitudinallyextending grooves adapted to receive said spine, the number of saidgrooves being such as to adapt said calk to be readily adjusted tovarious angular positions with relation to said shoe.

2. A horseshoe having an opening therein for receiving the shank of acalk, a calk one of said interfitting parts having formed around itscircumference a plurality of 1011- gitudinally extending grooves atintervals less than 180, and the other of said interfitting parts havingformed thereon a spline, said grooves being adapted to receive saidspline, the number of said grooves being such as to adapt said calk tobe readily adjusted to various angular positions With relation to saidshoe anddiffering one from 10 another by less than 90.

In Witness whereof, I hereunto subscribe my name .to this specificationin the presence of two Witnesses. H

GEORGE E. LINDBERG. Witnesses:

ARTHUR A. FIDER, F. A. WEBB.

Copies 01' this patent may be obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

Correction in Letters Patent No. 1,320,878

It is hereby certified that in Letters Patent No. 1,320,878, grantedNovember 4, 1919, upon the application of George E. Lindberg, of Duluth,Minnesota, for an improvement in Horseshoes, an error appears in theprinted specification requiring correction as follows: Page 1,line 100,claim 1, for the word spine read spline; and,thst the said LettersPatent should be read with this correction therein that the same mayconform to the record 0f the case in the Patent Ofiice.

' Signed and sealed this 6th day of January, A. 1)., 1920.

M. H. COULSTON, Acting Commissioner of Patents.

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